FROM node:12-alpine

RUN mkdir /code
WORKDIR /code

RUN apk add curl gzip \
    --virtual .build-dependencies

# Install and cache dependencies
RUN curl -L -o elm.gz https://github.com/elm/compiler/releases/download/0.19.1/binary-for-linux-64-bit.gz && \
    gunzip elm.gz && \
    chmod +x elm && \
    mv elm /usr/local/bin/

COPY package*.json /code/

# Install elm-analyse, elm linter, and elm test
RUN npm install
ENV PATH=$PATH:/code/node_modules/elm-linter/bin:/code/node_modules/elm-format/bin:/code/node_modules/elm-test/bin

# Add remainder of files
COPY . .

ENTRYPOINT ["/usr/local/bin/npm"]